General

• Output power capacity: 500 VA / 300 W

• UPS topology: Standby (offline)

• Waveform type: Stepped approximation to sine wave

• Transfer time (to battery): ~6 ms typical, 10 ms max

Input

• Nominal input voltage: 230 V AC

• Input voltage range: 180 – 266 V

• Input frequency: 50/60 Hz ± 5 Hz

• Input connector: IEC 60320 C14

• Maximum input current: 7.0 A

Output

• Nominal output voltage: 230 V AC

• Output frequency: 47–63 Hz sync to mains

• Output connections:
  • 2 × IEC C13 (Battery backup)
  • 1 × IEC C13 (Surge protection only)

Battery & Runtime

• Battery type: Sealed lead‑acid (VRLA)

• Typical recharge time: ~6 hours

• Replacement battery model: RBC2

• Expected battery life: ~4 – 6 years

• Runtime range: ~depends on load (e.g., minutes at higher loads)

Surge Protection

• Surge energy rating: ~310 Joules

• Filtering: full‑time multi‑pole noise filtering

Indicators & Alerts

• LED status indicators (power, battery, overload)

• Audible alarms for low battery and overload

Physical

• Dimensions (H×W×D): 165 × 91 × 284 mm

• Weight: ~5.7 kg

• Operating temperature: 0 – 40 °C

• Operating humidity: 0 – 95 %

Certifications & Warranty

• Conformance: CE, EN, VDE, GOST, etc.

• Standard warranty: ~2 years

Features

1. Battery Backup for Power Outages

The BK500CI provides temporary battery power during electricity outages, allowing you to safely save work, shut down devices, or keep small electronics running without interruption.

2. Surge Protection

It protects connected devices from voltage spikes and power surges, which can damage sensitive electronics like computers, modems, and routers.

3. Automatic Voltage Regulation (AVR)

The UPS automatically corrects minor voltage fluctuations without using battery power, keeping your devices safe and reducing unnecessary battery drain.

4. Simulated Sine Wave Output

When running on battery, the UPS delivers a simulated sine wave, which is compatible with most electronics and efficient for low‑to‑medium load devices.

5. LED Status Indicators

The unit features LED lights to clearly display the UPS status, including power availability, battery operation, and overload warnings, allowing quick visual monitoring.

6. Audible Alarms

In addition to LEDs, the UPS emits audible beeps to alert users of low battery, overload, or power loss situations, helping prevent sudden device shutdowns.

7. IEC C13 Output Sockets

It has dedicated outlets for battery backup and surge-only protection, ensuring that critical devices remain powered while less critical devices are only surge-protected.

8. Sealed Maintenance-Free Battery

The BK500CI uses a sealed lead-acid battery that requires no maintenance, is safe to operate indoors, and can be easily replaced when its life cycle ends.

9. Automatic Self-Test

The UPS periodically performs self-tests on its battery to ensure it is in good condition and ready to provide backup power when needed.

10. Compact and Lightweight Design

With a small footprint and manageable weight (~5.7 kg), it fits conveniently on or under a desk without taking up much space.

11. Wide Operating Voltage Range

It supports input voltages from 180 V to 266 V, making it suitable for areas with unstable electricity supply.

12. Protection Against Overload

The UPS monitors connected load and alerts or disconnects when the power draw exceeds its capacity, preventing damage to both the UPS and connected devices.

The applications of the APC Back‑UPS BK500CI and where it’s most useful

1. Desktop Computers and Workstations

• Provides backup power to PCs, allowing you to save work and shut down safely during power outages.

• Protects sensitive computer components from voltage fluctuations and surges.

2. Networking Equipment

• Keeps routers, modems, and switches powered during short blackouts to maintain internet connectivity.

• Ensures home or small office networks remain online without interruption.

3. Home Entertainment Systems

• Safeguards TVs, gaming consoles, and home theater devices against power surges.

• Prevents abrupt shutdowns that could damage electronics or interrupt media playback.

4. Small Office Electronics

• Ideal for printers, scanners, and external storage devices that need short-term backup during outages.

• Maintains productivity in environments with frequent or short power interruptions.

5. VoIP Phones and Communication Devices

• Keeps telephone systems, VoIP phones, and communication hubs running to avoid missed calls.

• Supports small business or home office communication reliability.

6. Security Systems

• Provides backup power for CCTV cameras, alarms, and access control devices during blackouts.

• Ensures continuous surveillance and safety in residential or small office setups.

7. Low-Power Lab or Medical Equipment

• Can temporarily power low-consumption devices like microscopes, lab sensors, or small medical monitors.

• Protects sensitive instruments from power surges that could affect measurements or damage equipment.

Summary

Essentially, the BK500CI is best suited for small-to-medium loads where short-term backup and surge protection are needed, but not for heavy servers, high-wattage machinery, or industrial equipment.